#include "uart4.h"

int main()
{

    uart4_init();
    char ch;
    while (1)
    {
        //读取电脑发送的字符
        ch=getchar();
        //将字符+返回给电脑
        putchar(ch+1);
        putchar('\n');
        putchar('\r');
    }
    return 0;
}
